Munkmarsch (Frisian: Munkmersk) is a village on the North Sea island of Sylt in the district of Nordfriesland in Schleswig-Holstein, Germany.

In 1888, Munkmarsch was linked to Westerland by the Sylter Inselbahn [de], reducing the travel time to 12 minutes.

Munkmarsch retained some of its importance until construction of the Hindenburgdamm in 1927, although after 1901 ferry traffic increasingly shifted to Hörnum.

During World War I, Munkmarsch was a major landing area for materiel and men when the island was fortified.

To the north of the village there are gravel pits in which sand for local construction is won and which have also yielded numerous fossils in the past.

Sylter Verkehrsgesellschaft [de] operates buses that provide public transport on the island.